Lepton flavor violating tau decays in type-III seesaw mechanism

Details Lepton flavor violating tau decays in type-III seesaw mechanism Lepton flavor violating tau decays in type-III seesaw mechanism

2009-03-09

arxiv.org/abs/0903.1553v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 1 figure, to match version in press in Phys.Rev.D

Scientific paper

In this paper, the lepton flavor violating $\tau\to \ell P(V)$ ($P,V= \pi^0, \eta, \eta^{\prime}, \rho^0, \omega, \phi$) and $\tau\to 3\ell$ ($\ell = e, \mu$) decays are studied in the framework of the type-III seesaw model, in which new triplet fermions with a zero hypercharge (Y=0) interact with ordinary lepton doublets via Yukawa couplings, and affect tree-level leptonic Z-boson couplings. We investigate the experimental bound from the leptonic Z decay to get contraint on the exsiting parameters space. We predict that the upper limits on the branching ratios of $\tau\to \ell P(V)$ and $\tau\to 3\ell$ can reach the experimental current limits.

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